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<div><a href="../index.html">Home</a> &gt;  <a href="index.html">fvcom_prepro</a> &gt; setup_metrics.m</div>

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<h1>setup_metrics
</h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>Setup metrics for mesh object Mesh</strong></div>

<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>function [Mobj]  = setup_metrics(Mobj) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Setup metrics for mesh object Mesh  

 [Mobj] = setup_metrics(Mobj)

 DESCRIPTION:
    Setup metrics for secondary connectivity (nodes surrounding nodes) for Mesh

 INPUT
    Mobj = Matlab mesh object

 OUTPUT:
    Mobj = Matlab mesh object with secondary connectivity

 EXAMPLE USAGE
    Mobj = setup_metrics(Mobj)

 Author(s):  
    Geoff Cowles (University of Massachusetts Dartmouth)

 Revision history
   
==============================================================================</pre></div>

<!-- crossreference -->
<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
This function calls:
<ul style="list-style-image:url(../matlabicon.gif)">
</ul>
This function is called by:
<ul style="list-style-image:url(../matlabicon.gif)">
<li><a href="example.html" class="code" title="">example</a>	example demonstrating reading in a 2DM file and constructing a model</li><li><a href="example2.html" class="code" title="">example2</a>	example demonstrating reading in an FVCOM mesh and smoothing the bathymetry</li></ul>
<!-- crossreference -->



<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function [Mobj]  = setup_metrics(Mobj)</a>
0002 
0003 <span class="comment">% Setup metrics for mesh object Mesh</span>
0004 <span class="comment">%</span>
0005 <span class="comment">% [Mobj] = setup_metrics(Mobj)</span>
0006 <span class="comment">%</span>
0007 <span class="comment">% DESCRIPTION:</span>
0008 <span class="comment">%    Setup metrics for secondary connectivity (nodes surrounding nodes) for Mesh</span>
0009 <span class="comment">%</span>
0010 <span class="comment">% INPUT</span>
0011 <span class="comment">%    Mobj = Matlab mesh object</span>
0012 <span class="comment">%</span>
0013 <span class="comment">% OUTPUT:</span>
0014 <span class="comment">%    Mobj = Matlab mesh object with secondary connectivity</span>
0015 <span class="comment">%</span>
0016 <span class="comment">% EXAMPLE USAGE</span>
0017 <span class="comment">%    Mobj = setup_metrics(Mobj)</span>
0018 <span class="comment">%</span>
0019 <span class="comment">% Author(s):</span>
0020 <span class="comment">%    Geoff Cowles (University of Massachusetts Dartmouth)</span>
0021 <span class="comment">%</span>
0022 <span class="comment">% Revision history</span>
0023 <span class="comment">%</span>
0024 <span class="comment">%==============================================================================</span>
0025 subname = <span class="string">'setup_metrics'</span>;
0026 <span class="keyword">global</span> ftbverbose
0027 <span class="keyword">if</span>(ftbverbose)
0028   fprintf(<span class="string">'\n'</span>)
0029   fprintf([<span class="string">'begin : '</span> subname <span class="string">'\n'</span>])
0030 <span class="keyword">end</span>;
0031 
0032 
0033 <span class="comment">%------------------------------------------------------------------------------</span>
0034 <span class="comment">% Calculate metrics</span>
0035 <span class="comment">%------------------------------------------------------------------------------</span>
0036 
0037 <span class="comment">% set local arrays</span>
0038 tri    = Mobj.tri;
0039 nElems = Mobj.nElems;
0040 nVerts = Mobj.nVerts;
0041 
0042 <span class="comment">% set xc/yc if they don't exist</span>
0043 <span class="keyword">if</span>(~isfield(Mobj,<span class="string">'xc'</span>));
0044   Mobj.xc = zeros(Mobj.nElems,1);
0045   Mobj.yc = zeros(Mobj.nElems,1);
0046   <span class="keyword">for</span> i=1:Mobj.nElems
0047     Mobj.xc(i) = sum(Mobj.x(Mobj.tri(i,1:3)))/3.;
0048     Mobj.yc(i) = sum(Mobj.y(Mobj.tri(i,1:3)))/3.;
0049   <span class="keyword">end</span>;
0050 <span class="keyword">end</span>;
0051 
0052 
0053 <span class="comment">% determine edges</span>
0054 nEdges = nElems*3;
0055 edge = zeros(nEdges,2);
0056 icnt = 1;
0057 <span class="keyword">for</span> i=1:nElems
0058   edge(icnt  ,1:2) = tri(i,1:2);
0059   edge(icnt+1,1:2) = tri(i,2:3);
0060   edge(icnt+2,1:2) = tri(i,[3,1]);
0061   icnt = icnt + 3;
0062 <span class="keyword">end</span>;
0063 
0064 <span class="comment">% determine nodes surrounding nodes (no specific order)</span>
0065 ntsn = zeros(nVerts,1);
0066 nbsn = zeros(nVerts,12);
0067 
0068 <span class="keyword">for</span> i=1:nEdges
0069   i1 = edge(i,1);
0070   i2 = edge(i,2);
0071   [lmin,loc] = min(abs(nbsn(i1,:)-i2));
0072   <span class="keyword">if</span>(lmin ~= 0);
0073     ntsn(i1) = ntsn(i1)+1;
0074     nbsn(i1,ntsn(i1)) = i2;
0075   <span class="keyword">end</span>;
0076   [lmin,loc] = min(abs(nbsn(i2,:)-i1));
0077   <span class="keyword">if</span>(lmin ~= 0);
0078     ntsn(i2) = ntsn(i2)+1;
0079     nbsn(i2,ntsn(i2)) = i1;
0080   <span class="keyword">end</span>;
0081 <span class="keyword">end</span>;
0082 
0083 
0084 
0085 <span class="comment">% transfer to struct</span>
0086 Mobj.ntsn = ntsn;
0087 Mobj.nbsn = nbsn;
0088 Mobj.have_mets = true;
0089 
0090 <span class="keyword">if</span>(ftbverbose)
0091   fprintf([<span class="string">'end   : '</span> subname <span class="string">'\n'</span>])
0092 <span class="keyword">end</span>;
0093</pre></div>
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